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Wave propagation through disordered media without backscattering and intensity variations.

Konstantinos G Makris1, Andre Brandstötter2, Philipp Ambichl2

  • 1Crete Center for Quantum Complexity and Nanotechnology, Department of Physics, University of Crete, Heraklion 71003, Greece.

Light, Science & Applications
|September 1, 2018
PubMed
Summary
This summary is machine-generated.

Complex wave scattering patterns in disordered media can be eliminated. By introducing specific gain and loss, constant-intensity waves with perfect transmission and no backscattering are achieved.

Keywords:
Anderson localisationcomplex medianon-Hermitian physicsscattering

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Area of Science:

  • Wave physics
  • Non-Hermitian systems
  • Disordered media

Background:

  • Wave scattering in disordered media leads to complex intensity patterns due to multi-path interference.
  • Controlling these complex patterns is crucial for understanding wave propagation.

Purpose of the Study:

  • To demonstrate the suppression of intensity variations in disordered media.
  • To show the creation of constant-intensity waves with perfect transmission.

Main Methods:

  • Introducing disorder-specific gain and loss components into the medium.
  • Utilizing non-Hermitian scattering landscapes.
  • Proposing spatially modulated pump beams for experimental control.

Main Results:

  • Complete suppression of intensity variations in wave scattering.
  • Generation of constant-intensity waves.
  • Achieving backscattering-free propagation and perfect transmission through disorder.

Conclusions:

  • Disorder-specific gain and loss can eliminate complex wave intensity patterns.
  • This method enables the creation of novel wave states with perfect transmission.
  • Experimental realization is feasible using controlled gain and loss in active media.